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Question 1:
One of the most accomplished ballistics engineers, Gerald Bull, was head of project HARP. The Pentagon and the Canadian Department of National Defence joined efforts in this project, trying to study ballistics of re-entry vehicles at low cost. They used 16 inch (406 mm) 50 caliber gun, which was later extended to 100 calibers (40 m), to fire shells toward the Atlantic at 3600 m/s. Do you know what HARP stood for?
A. Hazard Assessment of Rocket Propellants
B. Helping to Attract and Recruit Project
C. Highly Autonomous Roving Projectile
D. High Altitude Research Project

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